System description - Off-Grid Systemswith SUNNY ISLAND 4 ... · SMA Solar Technology AG 2 Safety...

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SI44M-80H-12-OffGrid-IA-en-11 | Version 1.1 ENGLISH System description Off-Grid Systems with SUNNY ISLAND 4.4M / 6.0H / 8.0H

Transcript of System description - Off-Grid Systemswith SUNNY ISLAND 4 ... · SMA Solar Technology AG 2 Safety...

Page 1: System description - Off-Grid Systemswith SUNNY ISLAND 4 ... · SMA Solar Technology AG 2 Safety System description SI44M-80H-12-OffGrid-IA-en-117 2 Safety 2.1 Intended Use Off-grid

SI44M-80H-12-OffGrid-IA-en-11 | Version 1.1ENGLISH

System descriptionOff-Grid Systems withSUNNY ISLAND 4.4M / 6.0H / 8.0H

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Legal Provisions SMA Solar Technology AG

System descriptionSI44M-80H-12-OffGrid-IA-en-112

Legal ProvisionsThe information contained in these documents is the property of SMA Solar Technology AG. Any publication, whetherin whole or in part, requires prior written approval by SMA Solar Technology AG. Internal reproduction used solely forthe purpose of product evaluation or other proper use is allowed and does not require prior approval.

SMA WarrantyYou can download the current warranty conditions from the Internet at www.SMA-Solar.com.

TrademarksAll trademarks are recognized, even if not explicitly identified as such. Missing designations do not mean that aproduct or brand is not a registered trademark.

SMA Solar Technology AGSonnenallee 134266 NiestetalGermanyTel. +49 561 9522-0Fax +49 561 9522-100www.SMA.deEmail: [email protected]: 4/20/2018Copyright © 2018 SMA Solar Technology AG. All rights reserved.

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Table of ContentsSMA Solar Technology AG

System description 3SI44M-80H-12-OffGrid-IA-en-11

Table of Contents1 Information on this Document..................................................................................................... 4

1.1 Validity ............................................................................................................................................................. 41.2 Target Group ................................................................................................................................................... 41.3 Content and Structure of this Document......................................................................................................... 41.4 Levels of warning messages............................................................................................................................ 41.5 Symbols in the Document................................................................................................................................ 51.6 Typographies in the document ....................................................................................................................... 51.7 Designation in the document .......................................................................................................................... 51.8 Explanation of Used Terms ............................................................................................................................. 61.9 Additional Information..................................................................................................................................... 6

2 Safety ............................................................................................................................................ 72.1 Intended Use.................................................................................................................................................... 72.2 Safety Information ........................................................................................................................................... 82.3 Battery Safety Information............................................................................................................................... 10

3 Functions and Design................................................................................................................... 133.1 Off-Grid System Functions............................................................................................................................... 133.2 Modular Design............................................................................................................................................... 14

3.2.1 Single System ................................................................................................................................................... 143.2.2 Single-Cluster System (Single-Phase) .............................................................................................................. 143.2.3 Single-Cluster System (Three-Phase) ............................................................................................................... 153.2.4 Multicluster System........................................................................................................................................... 15

3.3 Information on Off-Grid Systems .................................................................................................................... 163.4 Optional Devices and Functions..................................................................................................................... 18

4 Single System ............................................................................................................................... 194.1 Circuitry Overview........................................................................................................................................... 194.2 Connection of the Sunny Island...................................................................................................................... 20

5 Single-Cluster System................................................................................................................... 225.1 Circuitry Overview Single-Phase Single-Cluster System ................................................................................ 225.2 Circuitry Overview Three-Phase Single-Cluster System ................................................................................. 245.3 Connecting Sunny Island Inverters ................................................................................................................. 25

5.3.1 Connecting the Master .................................................................................................................................... 255.3.2 Connecting the Slaves ..................................................................................................................................... 27

6 Multicluster System ...................................................................................................................... 29

7 Commissioning ............................................................................................................................. 307.1 Commissioning Procedure............................................................................................................................... 307.2 Testing the Battery Current Sensor ................................................................................................................. 307.3 Testing the Generator...................................................................................................................................... 317.4 Testing the Load Shedding.............................................................................................................................. 317.5 Commissioning the PV System ........................................................................................................................ 327.6 Testing Communication in the Multicluster System ........................................................................................ 327.7 Complete Commissioning. .............................................................................................................................. 33

8 Contact .......................................................................................................................................... 34

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1 Information on this Document SMA Solar Technology AG

System descriptionSI44M-80H-12-OffGrid-IA-en-114

1 Information on this Document1.1 ValidityThis document is valid for off-grid systems with the following device types:

• SI4.4M-12 (Sunny Island 4.4M) with firmware version 1.00.xx.R• SI6.0H-12 (Sunny Island 6.0H) with firmware version 1.00.xx.R• SI8.0H-12 (Sunny Island 8.0H) with firmware version 1.00.xx.R• MC-BOX-6.3-11 (Multicluster-Box 6)• MC-BOX-12.3-20 (Multicluster-Box 12)• MC-BOX-36.3-11 (Multicluster-Box 36)

1.2 Target GroupThe tasks described in this document must only be performed by qualified persons. Qualified persons must have thefollowing skills:

• Knowledge of how an inverter works and is operated• Knowledge of how batteries work and are operated• Training in the installation and commissioning of electrical devices and installations• Knowledge of all applicable laws, standards and directives• Knowledge of and compliance with this document and all safety information• Knowledge of and compliance with the documents of the battery manufacturer with all safety information

1.3 Content and Structure of this DocumentThis document summarizes the specific information on off-grid systems with Sunny Island inverters.Circuitry overviews provide the basic principle of how an system must be connected. The structure of the documentspecifies the chronological sequence for configuration and commissioning. This document does not replace thedocumentation of the individual products. You will find details and help in the event of difficulties in the documentationof the respective product.

1.4 Levels of warning messagesThe following levels of warning messages may occur when handling the product.

DANGER

Indicates a hazardous situation which, if not avoided, will result in death or serious injury.

WARNING

Indicates a hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION

Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

NOTICE

Indicates a situation which, if not avoided, can result in property damage.

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1 Information on this DocumentSMA Solar Technology AG

System description 5SI44M-80H-12-OffGrid-IA-en-11

1.5 Symbols in the DocumentSymbol Explanation

Information that is important for a specific topic or goal, but is not safety-relevant

Example

☐ Indicates a requirement for meeting a specific goal

☑ Desired result

✖ A problem that might occur

This information is relevant for systems which are to be operated in parallel with utility grid.(e.g. SMA Flexible Storage System).

Content is relevant for off-grid systems.

1.6 Typographies in the documentTypography Use Example

bold • Messages• Terminals• Elements on a user interface• Elements to be selected• Elements to be entered

• Connect the insulated conductorsto the terminals X703:1 toX703:6.

• Enter 10 in the field Minutes.

> • Connects several elements to beselected

• Select Settings > Date.

[Button][Key]

• Button or key to be selected or pressed • Select [Enter].

1.7 Designation in the documentComplete designation Designation in this document

Sunny Boy, Sunny Tripower PV inverter

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1 Information on this Document SMA Solar Technology AG

System descriptionSI44M-80H-12-OffGrid-IA-en-116

1.8 Explanation of Used TermsTerm Explanation

External energy source Grid-forming generators such as electric generators or utility grids

Stand-alone grid Stand-alone grids are self-sufficient utility grids that are supplied with power fromdifferent energy sources. The Sunny Island forms the stand-alone grid and regu-lates the balance between the energy that is fed in and the energy that is used.

Off-grid system All components belonging to the stand-alone grid (e.g., Sunny Island)

1.9 Additional InformationFor more information, please go to www.SMA-Solar.com.

Title and information content Type of information

"SUNNY ISLAND System Guide - System Solutions for Your Stand-Alone PowerSupply"

Brochure

"Sunny Island Generator - Whitepaper" Technical File

"Grounding in Off-Grid Systems" Technical Information

"Design of Off-Grid Systems with Sunny Island Devices" Planning Guidelines

"Multicluster Systems with Stand-Alone Grid or Increased Self-Consumption andBattery-Backup Function"

System Description

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2 SafetySMA Solar Technology AG

System description 7SI44M-80H-12-OffGrid-IA-en-11

2 Safety2.1 Intended UseOff-grid systems with Sunny Island are used to set up self-sufficient utility grids. The Sunny Island forms the stand-alonegrid as a voltage source. The Sunny Island regulates the balance between the energy fed in and energy used andfeatures a management system that manages the battery, generators and loads. AC sources (e.g. PV inverters) supplyloads and are used by the Sunny Island to recharge the battery. In order to be able to increase the availability of theoff-grid system and reduce the battery capacity, the Sunny Island can use and control a generator as an energysource.Off-grid systems with Sunny Island form single-phase or three-phase AC distribution grids.The locally applicable standards and directives must also be observed for off-grid systems. Loads in off-grid systemsare not protected against power failure.The product is not suitable for supplying life-sustaining medical devices. A power outage must not lead to personalinjury.Loads connected to the Sunny Island must have an CE, RCM or UL identification label.Only the device types SI6.0H-12 and SI8.0H-12 are suitable for single-phase single cluster systems and three-phasemulti cluster systems (see planning guidelines "Design of Off-Grid Systems with Sunny Island Devices" at www.SMA-Solar.com). Several clusters may only be interconnected if the Multicluster-Box 6 / 12 (MC-BOX-12.3-20) / 36 isused.The circuitry of the Sunny Island inverters forming a cluster and the circuitry of several clusters in a multicluster systemmust be carried out in accordance with this documentation (see Section 3 "Functions and Design", page 13).In off-grid systems, the maximum output power of the non-adjustable AC current sources (e.g. wind turbine system orCHP plant) must not exceed the total power of all Sunny Island devices (for technical data, see the Sunny Islandoperating manual).The connected PV inverters must be suitable for use in off-grid systems. The power of the PV system must beappropriate for the system (see planning guidelines "Design of Off-Grid Systems with Sunny Island Devices" atwww.SMA-Solar.com).The entire battery voltage range must be completely within the permissible DC input voltage range of the Sunny Island.The maximum permissible DC input voltage of the Sunny Island must not be exceeded. A battery fuse must be installedbetween the battery and the Sunny Island.With lead-acid batteries, the battery room must be ventilated in accordance with the requirements of the batterymanufacturer and with the locally applicable standards and directives (see documentation of the batterymanufacturer).The following conditions must be satisfied for lithium-ion batteries:

• The lithium-ion battery must comply with the locally applicable standards and directives and must be intrinsicallysafe.

• The battery management of the lithium-ion battery used must be compatible with the Sunny Island (see thetechnical information at “List of Approved Batteries”).

• The lithium-ion battery must be able to supply enough current at maximum output power of the Sunny Island (fortechnical data see the Sunny Island operating manual).

An DC supply grid may not be established with the Sunny Island.Use this product only in accordance with the information provided in the enclosed documentation and with the locallyapplicable standards and directives. Any other application may cause personal injury or property damage.Alterations to the product, e.g. changes or modifications, are only permitted with the express written permission ofSMA Solar Technology AG. Unauthorized alterations will void guarantee and warranty claims and in most casesterminate the operating license. SMA Solar Technology AG shall not be held liable for any damage caused by suchchanges.

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2 Safety SMA Solar Technology AG

System descriptionSI44M-80H-12-OffGrid-IA-en-118

Any use of the product other than that described in the Intended Use section does not qualify as the intended use.The enclosed documentation is an integral part of this product. Keep the documentation in a convenient place forfuture reference and observe all instructions contained therein.

2.2 Safety InformationThis section contains safety information that must be observed at all times when working on or with the product.To prevent personal injury and property damage and to ensure long-term operation of the product, read this sectioncarefully and observe all safety information at all times.

DANGER

Danger to life from electric shock due to live voltageHigh voltages are present in the live components of the inverter when in operation. Touching live components resultsin death or serious injury due to electric shock.

• Wear suitable personal protective equipment for all work on the product.• Do not touch any live components.• Observe all warning messages on the inverter and in the documentation.• Observe all safety information of the battery manufacturer.• Switch off or disconnect the following components from voltage sources in the following order before carrying

out any work:– Sunny Island– The circuit breakers of the Sunny Island, the control and measurement voltages– All circuit breakers and load-break switches of the connected AC sources– Load-break switch of the battery fuse

• Ensure that no disconnected devices can be reconnected.• After disconnecting the Sunny Island from voltage sources, wait at least 15 minutes for the capacitors to

discharge completely before opening the doors.• Before carrying out any work make sure that all devices are completely voltage-free.• Cover or isolate any adjacent live components.

DANGER

Danger to life due to electric shockOvervoltages (e. g. in the case of a flash of lightning) can be further conducted into the building and to otherconnected devices in the same network via network cables or other data cables if there is no overvoltageprotection.

• Ensure that all devices in the same network and the battery are integrated in the existing overvoltageprotection.

• When laying the network cables or other data cables outdoors, attention must be given to suitable overvoltageprotection at the cable transition from the inverter or the battery outdoors to the inside of a building.

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System description 9SI44M-80H-12-OffGrid-IA-en-11

WARNING

Danger to life from electric shock due to circuit breakers that cannot be trippedIn an off-grid system and battery-backup system, only the circuit breakers that can be tripped by the Sunny Islandcan be tripped in the event of a grid failure. Circuit breakers with a higher operating current cannot be tripped.Under fault conditions, a voltage that poses a danger to life may be present on accessible parts for severalseconds.

• Check if a circuit breaker has a higher trip characteristic than the following circuit breakers which can betripped:

– SI4.4M-12: circuit breaker with trip characteristic B6 (B6A)– SI6.0H-12 and SI8.0H-12: circuit breaker with trip characteristic B16 (B16A) or circuit breaker with trip

characteristic C6 (C6A)• If a circuit breaker has a higher trip characteristic than the specified circuit breakers that can be tripped, you

should also install a residual-current device of type A.

WARNING

Danger to life from electric shock due to overvoltagesOvervoltages of up to 1500 V can occur in the stand-alone grid and in the battery-backup grid. If the connectedloads have not been designed for these overvoltages, a voltage that poses a danger to life may be present onaccessible parts for several seconds.

• Only connect loads that have a CE, RCM or UL designation. Loads with a CE, RCM or UL designation aredesigned for overvoltages of up to 1500 V.

• Operate the loads only when they are technically faultless and in an operationally safe state.• Check the loads regularly for visible damage.

WARNING

Danger to life from electric shock due to damaged inverterOperating a damaged inverter can lead to hazardous situations that can result in death or serious injuries due toelectric shock.

• Only use the inverter when it is technically faultless and in an operationally safe state.• Check the inverter regularly for visible damage.• Make sure that all external safety equipment is freely accessible at all times.• Make sure that all safety equipment is in good working order at any time.

WARNING

Risk of crushing injuries due to moving PV array partsA generator can be started automatically by the Sunny Island. Moving parts in the PV array can crush or severbody parts.

• Operate the generator only with the specified safety equipment.• Carry out all work on the generator in accordance with the manufacturer's specifications.

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CAUTION

Risk of burns due to short-circuit currents on the disconnected inverterThe capacitors in the DC input area of the inverter store energy. After the battery is isolated from the inverter,battery voltage is still temporarily present at the DC terminal. A short circuit at the DC terminal of the inverter canlead to burns and may damage the inverter.

• Wait 15 minutes before performing any work at the DC terminal or on the DC cables. This allows thecapacitors to discharge.

CAUTION

Risk of burns due to hot enclosure partsSome parts of the enclosure can get hot during operation.

• Mount the inverter in such a way that it cannot be touched inadvertently during operation.

NOTICE

Damage to the product due to sand, dust or moisture penetrationSand, dust or moisture penetration can damage the inverter or impair its functionality.

• Do not open the inverter during a sandstorm, precipitation or when humidity exceeds 95%.• Only perform maintenance work on the inverter when the environment is dry and free of dust.

NOTICE

Damage to the inverter due to electrostatic dischargeTouching electronic components can cause damage to or destroy the inverter through electrostatic discharge.

• Ground yourself before touching any component.

NOTICE

Damage to the enclosure seal in subfreezing conditionsIf you open the product when temperatures are below freezing, the enclosure seals can be damaged. Moisture canpenetrate the product then.

• Only open the product if the ambient temperature is not below -5°C.• If a layer of ice has formed on the enclosure seal when temperatures are below freezing, remove it prior to

opening the product (e.g. by melting the ice with warm air). Observe the applicable safety regulations.

2.3 Battery Safety InformationThis section contains safety information that must be observed at all times when working on or with batteries.To prevent personal injury or property damage and to ensure long-term operation of the batteries, read this sectioncarefully and observe all safety information at all times.

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2 SafetySMA Solar Technology AG

System description 11SI44M-80H-12-OffGrid-IA-en-11

WARNING

Danger to life due to incompatible lithium-ion batteryAn incompatible lithium-ion battery can lead to a fire or an explosion. With incompatible lithium-ion batteries, it isnot ensured that battery management is intrinsically safe and will protect the battery.

• Ensure that the lithium-ion batteries are approved for use with the Sunny Island (see technical information “Listof Approved Batteries” at www.SMA-Solar.com).

• If no lithium-ion batteries approved for the inverter can be used, lead-acid batteries can be used.• Verify that the battery complies with locally applicable standards and directives and is intrinsically safe.

WARNING

Danger to life due to explosive gasesExplosive gases may escape from the battery and cause an explosion.

• Protect the battery environment from open flames, embers and sparks.• Install, operate and maintain the battery in accordance with the manufacturer’s specifications.• Do not burn the battery and do not heat it beyond the permitted temperature.• Additional measures for lead-acid batteries: Ensure that the battery room is sufficiently ventilated.

WARNING

Chemical burns due to battery electrolyteIf handled inappropriately, battery electrolyte can leak from the battery and cause irritation to the eyes, respiratorysystem and skin.

• Install, operate, maintain and dispose of the battery according to the manufacturer’s specifications.• Whenever working on the battery, wear suitable personal protective equipment such as rubber gloves, an

apron, rubber boots and goggles.• Rinse acid splashes thoroughly for a long time with clear water, and consult a doctor immediately.• If acid fumes have been inhaled, consult a doctor immediately.

WARNING

Risk of burns due to flashesShort-circuit currents in the battery can cause heat build-up and flashes.

• Remove watches, rings and other metal objects prior to carrying out any work on the battery.• Use insulated tools for all work on the battery.• Do not place tools or metal parts on the battery.

CAUTION

Risk of burns due to hot battery componentsImproper battery connection may result in excessively high transition resistances. Excessive transition resistancesgive rise to localized heat build-up.

• Ensure that all pole connectors are connected with the connecting torque specified by the batterymanufacturer.

• Ensure that all DC cables are connected with the connecting torque specified by the battery manufacturer.

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NOTICE

Damage to the battery due to incorrect settingsThe set battery parameters influence the charging behavior of the inverter. The battery can be damaged byincorrect settings of the battery type, nominal voltage and capacity parameters.

• Set the correct battery type as well as the correct values for nominal voltage and battery capacity whenconfiguring.

• Ensure that the values recommended by the manufacturer are set for the battery (refer to the technical data ofthe battery in the manufacturer documentation).

NOTICE

Permanent damage to the battery due to improper handlingImproper set-up and maintenance of the battery can cause it to become permanently damaged. Logs can help todetermine the cause.

• Comply with all requirements of the battery manufacturer with regard to mounting location.• Check and log the status of the battery before performing maintenance work. Tip: Many battery manufacturers

provide suitable logs.– Check the battery for visible damage and log.– Measure and log the fill level and acid density of FLA batteries.– In the case of lead-acid batteries, measure and log the voltages of the individual cells.– Perform and log the test routines required by the battery manufacturer.

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3 Functions and DesignSMA Solar Technology AG

System description 13SI44M-80H-12-OffGrid-IA-en-11

3 Functions and Design3.1 Off-Grid System FunctionsOff-grid systems with one or several Sunny Island are self-sufficient utility grids that are being fed with energy fromseveral AC power sources in the stand-alone grid (e.g., PV inverter) and grid-forming AC sources (e.g., from agenerator). The Sunny Island forms the stand-alone grid as an AC voltage source and provides active and reactivepower. The Sunny Island regulates the balance between the energy fed in and energy used and features amanagement system that manages the battery, generators and loads.In order to be able to distribute the output power of the off-grid system to the loads, several Sunny Island inverters canbe interconnected modularly.

Battery ManagementExact determination of the state of charge is a basic requirement for the correct operation of lead-acid batteries.The Sunny Island battery management system for lead-acid batteries is based on an exact determination of the state ofcharge. By combining the three most common methods for recording the state of charge, the Sunny Island reaches ameasuring accuracy of more than 95%. This way, battery overcharge and deep discharge are avoided.Another advantage of the battery management system is the very gentle charging control. Depending on the batterytype and situation, it selects automatically the optimum charging strategy. This means that overcharging can be reliablyprevented and that the battery can be fully charged regularly. The available charge energy is used optimally at alltimes (see technical information "Battery Management" at www.SMA-Solar.com).

Generator ManagementThe Sunny Island can synchronize with a generator and connect directly, if necessary. When the stand-alone grid isconnected to the PV array, the voltage and frequency in the stand-alone grid are regulated by the PV array.The Sunny Island generator management allows for uninterruptible connection of the stand-alone grid to the generatorand uninterruptible isolation from the generator. The generator management controls the generator via a start and stopsignal. A generator current control ensures that the generator always remains at the optimum operating point. Thegenerator management allows the use of generators that have a low output power in proportion to the nominal load(see technical document "Sunny Island Generator - Whitepaper" at www.SMA-Solar.com)

Load ControlThe load control enables control of the AC sources in stand-alone grids, control of a generator, and the specificdisconnection of loads.The AC sources in the off-grid system are limited in their power output by the stand-alone grid frequency. In case ofexcess energy, the load control system increases the power frequency of the stand-alone grid. This limits the outputpower of the PV inverters, for example.If there is not enough energy available for all loads or the battery is to be preserved, load control can request energyfrom a generator by means of the generator management. The generator management starts the generator and the off-grid system is supplied with sufficient energy.If no generator is present in the off-grid system or the energy is not sufficient despite the generator being available,load control turns the loads off using load shedding. All loads are shed simultaneously with one-stage load shedding.A load shedding contactor sheds the noncritical loads during the first stage with two-stage load shedding. Theremaining loads are shed during the second stage only when the state of charge declines further. This can furtherincrease the availability of the stand-alone grid for critical loads.

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3 Functions and Design SMA Solar Technology AG

System descriptionSI44M-80H-12-OffGrid-IA-en-1114

3.2 Modular Design

3.2.1 Single System

3

3

3

3 3

AC1AC2AC1 AC2

PV INVERTER

GENERATOR

LOADS

AC cable 3-wire

DC cable

BATTERY

Figure 1: Principle of a single system

In a single system, one Sunny Island forms a single-phase stand-alone grid.

3.2.2 Single-Cluster System (Single-Phase)Required device types for single-phase single-cluster systemsIn single-phase single-cluster systems, the Sunny Island inverters must be of device type SI6.0H-12 or SI8.0H-12.

AC1 AC2

Master Slave 1

AC1 AC2

Slave 2

AC1 AC2

3

PV INVERTER

LOADS

BATTERY

GENERATOR

AC cable 3-wire

DC cable

Figure 2: Principle of a single-phase single-cluster system

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System description 15SI44M-80H-12-OffGrid-IA-en-11

In a single-phase single-cluster system, up to three Sunny Island inverters are connected to one battery forming acluster. The Sunny Island inverters are connected on the AC side to the same line conductor. If the device types withinthe cluster are different, the master must be an SI8.0H-12.

3.2.3 Single-Cluster System (Three-Phase)

AC1 AC2

Master Slave 1

AC1 AC2

Slave 2

AC1 AC2

3

5

5

5

5

PV INVERTER

LOADS

BATTERY

GENERATOR

AC cable 3-wire

DC cable

AC cable 5-wire

Figure 3: Principle of a three-phase single-cluster system

In a three-phase single-cluster system, up to three Sunny Island inverters are connected to one battery forming a cluster.The Sunny Island inverters are connected on the AC side to three different line conductors.

3.2.4 Multicluster SystemRequired device types for multicluster systemsIn multicluster systems for stand-alone grids, the following device types must be used:

• SI6.0H-12 (Sunny Island 6.0H)• SI8.0H-12 (Sunny Island 8.0H)• MC-BOX-6.3-11 (Multicluster-Box 6)• MC-BOX-12.3-20 (Multicluster-Box 12)• MC-BOX-36.3-11 (Multicluster-Box 36)

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5

333

333

5

5

MULTICLUSTER BOX

5

3

PV INVERTER GENERATOR

LOADS

Extension ClusterMain Cluster

AC cable 5-wire

DC cable

AC cable 3-wire

Figure 4: Principle of a multicluster system

Multicluster systems consist of several three-phase clusters. The individual clusters must be connected to a Multicluster-Box. The Multicluster-Box is an SMA multicluster technology device for off-grid systems, battery-backup systems andsystems for increased self-consumption.The Multicluster-Box is a main AC distribution board to which up to twelve clusters can be connected. Each three-phasecluster is made up of three DC-side, parallel-switched Sunny Island.Only Sunny Island inverters of the same device type may be installed in a cluster: SI6.0H-12 or SI8.0H-12.

3.3 Information on Off-Grid Systems

Information on Batteries

Lithium-ion batteries in off-grid systemsIn order to meet the requirements of off-grid systems, the Sunny Island has a high overload capacity. This overloadcapacity is subject to the battery being able to supply sufficient current. With lithium-ion batteries, this ampacity cannotbe taken for granted.

• Check with the battery manufacturer whether the battery is suitable for off-grid systems with Sunny Island inverters.Pay special attention to the ampacity.

Recommendations for battery capacitySMA Solar Technology AG recommends the following minimum battery capacities.

• Minimum battery capacity per Sunny Island inverter:– SI4.4M-12: 150 Ah– SI6.0H-12: 190 Ah– SI8.0H-12: 250 Ah

• Minimum battery capacity per 1000 Wp power of the PV system: 100 AhThe sum of the individual battery capacities is the total minimum battery capacity and applies to a ten-hour electricdischarge (C10). The minimum battery capacity must be observed to ensure stable operation of the system.

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3 Functions and DesignSMA Solar Technology AG

System description 17SI44M-80H-12-OffGrid-IA-en-11

Information on Clusters

Clusters in multicluster systems

Device type Potential device typeswithin a cluster

Explanation

SI4.4M-12 – The device type SI4.4M-12 must not be used in multicluster systems.

SI6.0H-12 SI6.0H-12 or SI8.0H-12 Only Sunny Island inverters of the same device type may be installedin a cluster: SI6.0H-12 or SI8.0H-12.

SI8.0H-12 SI6.0H-12 or SI8.0H-12

Clusters in three-phase single-cluster systems

Device type Potential device typeswithin a cluster

Explanation

SI4.4M-12 SI4.4M-12 Only the device type SI4.4M-12 may be installed in a cluster.

SI6.0H-12 SI6.0H-12 or SI8.0H-12 A cluster can consist of one or both device types. If both device typeswithin the cluster are used, the master must be of device typeSI8.0H-12.SI8.0H-12 SI6.0H-12 or SI8.0H-12

Clusters in single-phase single-cluster systems

Device type Potential device typeswithin a cluster

Explanation

SI4.4M-12 – The device type SI4.4M-12 must not be used in the single-phase clus-ter system.

SI6.0H-12 SI6.0H-12 or SI8.0H-12 A cluster can consist of one or both device types. If both device typeswithin the cluster are used, the master must be of device typeSI8.0H-12.SI8.0H-12 SI6.0H-12 or SI8.0H-12

Connection of the Sunny Island inverters in single-phase single-cluster systemsIn a single-phase single-cluster system, the following cable lengths and conductor cross-sections must be designed thesame way:

• From the generator to each Sunny Island• From each Sunny Island to the AC distribution board• From the battery fuse to each Sunny Island

The same design is a requirement for stable and symmetrical operation of the off-grid system.

Information on the PV System

Maximum PV system powerIn off-grid systems, the maximum PV system power depends on the total power of the Sunny Island inverters.

• Maximum output power of the PV system per SI4.4M-12: 4600 W• Maximum output power of the PV system per SI6.0H-12: 9200 W• Maximum output power of the PV system per SI8.0H-12: 12000 W

The maximum output power of the PV system must be observed to ensure stable operation of the off-grid system.

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3 Functions and Design SMA Solar Technology AG

System descriptionSI44M-80H-12-OffGrid-IA-en-1118

3.4 Optional Devices and FunctionsThe following devices can be used optionally in an off-grid system:

Component Description

Load-shedding contactor Contactor controlled by the Sunny Island for isolation of loads

SMA Cluster Controller Remote monitoring and system configuration of the off-grid system

Battery current sensor Shunt for measuring the battery current

Sunny Island offers the following functions for off-grid systems via two multifunction relays (see Sunny Island operatingmanual for more information on the connection):

Function Description

Controlling PV arrays A multifunction relay is activated when requested by the Sunny Island generatormanagement. With the multifunction relay, you can control PV arrays with anelectrical remote-start function or connect a signal generator for PV arrays withno autostart function.

Controlling load-shedding con-tactors

A multifunction relay is activated depending on the state of charge of the battery.Depending on the configuration of the Sunny Island, you can install a one-levelload shedding with one multifunction relay or a two-level load shedding with twomultifunction relays. You can adjust the thresholds for the state of charge of thebattery depending on the time of day.

Time control for external pro-cesses

External processes can be time-controlled with a multifunction relay.

Display of operating states andwarning messages

You can connect message devices to the multifunction relays to display operatingstates and warning messages of the Sunny Island. One of the following operat-ing states and warning messages can be displayed for each multifunction relay:

• The PV array is running and is connected.• A Sunny Island displays an error message of level 2 or higher. Only the

error messages within a cluster are evaluated here.• A Sunny Island displays a warning. Only the warnings within a cluster are

evaluated here.• The Sunny Island is in operation in a single system.• The respective cluster is in operation in a cluster system.• The Sunny Island is in derating in a single system.• The respective cluster is in derating in a cluster system.

Control of a battery-room fan The multifunction relay is activated when the charging current causes the batteryto emit gasses. A connected battery room fan is switched on for at least onehour.

Control of an electrolyte pump Depending on the nominal energy throughput, the multifunction relay is activatedat least once a day.

Use of excess energy During the constant voltage phase, a multifunction relay is activated and thuscontrols additional loads that can put any excess energy of AC sources in the off-grid system (e.g., of a PV system) to good use.

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4 Single SystemSMA Solar Technology AG

System description 19SI44M-80H-12-OffGrid-IA-en-11

4 Single System4.1 Circuitry Overview

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4 Single System SMA Solar Technology AG

System descriptionSI44M-80H-12-OffGrid-IA-en-1120

4.2 Connection of the Sunny Island

NO C NCRelay 1

NO C NCRelay 2

A B C D E F G H I

Figure 6: Connection of the Sunny Island

Position Designation Description / information

A AC power cable of thestand-alone grid

Sunny Island: connection to AC1 Loads/SunnyBoys terminals L, N,and PEConductor cross-section: maximum 16 mm2

Only use the supplied ferrite for PE.

B AC power cable of thegenerator

Sunny Island: connection to AC2 Gen/Grid terminals L and NConductor cross-section: maximum 16 mm2

The Sunny Island must be connected via a grounding conductor onthe terminal AC1 or AC2 to the ground potential. The conductorcross-section of the grounding conductor must be at least 10 mm2. Ifthe conductor cross-section is smaller, an additional grounding con-ductor on the enclosure with the conductor cross-section of the ACpower cable must connect the Sunny Island with the ground poten-tial.

C DC+ cable Battery connectionConductor cross-section: from 50 mm2 to 95 mm2

Cable diameters: 14 mm to 25 mmTorque: 12 Nm

D DC- cable

E Control cable, generator Sunny Island: terminals Relay1 NO and Relay1 CConductor cross-section: from 0.2 mm2 to 2.5 mm2

Page 21: System description - Off-Grid Systemswith SUNNY ISLAND 4 ... · SMA Solar Technology AG 2 Safety System description SI44M-80H-12-OffGrid-IA-en-117 2 Safety 2.1 Intended Use Off-grid

4 Single SystemSMA Solar Technology AG

System description 21SI44M-80H-12-OffGrid-IA-en-11

Position Designation Description / information

F Measuring cable of the bat-tery temperature sensor

Sunny Island: terminal BatTmpYou only have to connect a battery temperature sensor if lead-acidbatteries are used.Mount the battery temperature sensor in the middle of the battery-storage system, in the upper third of the battery cell.Use the supplied ferrite.

G Control cable, load shed-ding

Sunny Island: connect the control cable to terminals Relay2 NO andBatVtgOut -.Connect the terminals Relay2 C and BatVtgOut+ within theSunny Island.Conductor cross-section: from 0.2 mm2 to 2.5 mm2

The complete DC voltage range is mapped at the terminal BatVt-gOut. The connection BatVtgOut is current-limited and protectedagainst short circuits. Use the supplied ferrite for BatVtgOut.

H Speedwire network cable Terminal ComETH

I Data cable to lithium-ionbattery

Sunny Island: terminal ComSyncInA data cable must be connected to the battery only when lithium-ionbatteries are used. The communication bus must be equipped with aterminator on both ends.

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5 Single-Cluster System SMA Solar Technology AG

System descriptionSI44M-80H-12-OffGrid-IA-en-1122

5 Single-Cluster System5.1 Circuitry Overview Single-Phase Single-Cluster System

Required device types for single-phase single-cluster systemsIn single-phase single-cluster systems, the Sunny Island inverters must be of device type SI6.0H-12 or SI8.0H-12.

Page 23: System description - Off-Grid Systemswith SUNNY ISLAND 4 ... · SMA Solar Technology AG 2 Safety System description SI44M-80H-12-OffGrid-IA-en-117 2 Safety 2.1 Intended Use Off-grid

5 Single-Cluster SystemSMA Solar Technology AG

System description 23SI44M-80H-12-OffGrid-IA-en-11

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Figure 7: Circuitry overview single-phase single-cluster system, only possible with SI6.0H-12 or SI8.0H-12

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5 Single-Cluster System SMA Solar Technology AG

System descriptionSI44M-80H-12-OffGrid-IA-en-1124

5.2 Circuitry Overview Three-Phase Single-Cluster System

PENL1 L2 L3

2)

RCD

L1 L2 L3 N PE

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Figure 8: Circuitry overview three-phase single-cluster

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5 Single-Cluster SystemSMA Solar Technology AG

System description 25SI44M-80H-12-OffGrid-IA-en-11

5.3 Connecting Sunny Island Inverters

5.3.1 Connecting the Master

NO C NCRelay 1

NO C NCRelay 2

A B C D E F G H I J

Figure 9: Connection of the master in the single-cluster system

Position Designation Description / information

A AC power cable of thestand-alone grid

Sunny Island: connection to AC1 Loads/SunnyBoys terminals L, N,and PESingle cluster system: connect master to line conductor L1.Conductor cross-section: maximum 16 mm2

Only use the supplied ferrite for PE.

B AC power cable of thegenerator

Sunny Island: connection to AC2 Gen/Grid terminals L and NGenerator: connect master to line conductor L1.Conductor cross-section: maximum 16 mm2

For a single-phase system, the cable length and the conductor cross-section must be identical on each Sunny Island.The Sunny Island must be connected via a grounding conductor onthe terminal AC1 or AC2 to the ground potential. The conductorcross-section of the grounding conductor must be at least 10 mm2. Ifthe conductor cross-section is smaller, an additional grounding con-ductor on the enclosure with the conductor cross-section of the ACpower cable must connect the Sunny Island with the ground poten-tial.

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5 Single-Cluster System SMA Solar Technology AG

System descriptionSI44M-80H-12-OffGrid-IA-en-1126

Position Designation Description / information

C DC+ cable Battery connectionFor a single-cluster system, the cable length and the conductor cross-section must be identical on each Sunny Island.Conductor cross-section: from 50 mm2 to 95 mm2

Cable diameters: 14 mm to 25 mmTorque: 12 Nm

D DC- cable

E Control cable, generator Sunny Island: terminals Relay1 NO and Relay1 CConductor cross-section: from 0.2 mm2 to 2.5 mm2

F Measuring cable of the bat-tery temperature sensor

Sunny Island: terminal BatTmpYou only have to connect a battery temperature sensor if lead-acidbatteries are used.Mount the battery temperature sensor in the middle of the battery-storage system, in the upper third of the battery cell.Use the supplied ferrite.

G Control cable, load shed-ding

Connect the control cable to terminals Relay2 NO and BatVtgOut- in the Sunny Island.Connect the terminals Relay2 C and BatVtgOut+ within theSunny Island.Conductor cross-section: from 0.2 mm2 to 2.5 mm2

The complete DC voltage range is mapped at the terminal BatVt-gOut. The connection BatVtgOut is current-limited and protectedagainst short circuits. Use the supplied ferrite for BatVtgOut.

H Speedwire network cable Terminal ComETH

I Data cable for battery man-agement

Sunny Island: terminal ComSyncInA data cable must be connected to the battery only when lithium-ionbatteries are used. The communication bus must be equipped with aterminator on both ends.

J Data cable for the internalcommunication in the clus-ter

Sunny Island: terminal ComSyncOutConnection of internal communication bus of slave 1

Page 27: System description - Off-Grid Systemswith SUNNY ISLAND 4 ... · SMA Solar Technology AG 2 Safety System description SI44M-80H-12-OffGrid-IA-en-117 2 Safety 2.1 Intended Use Off-grid

5 Single-Cluster SystemSMA Solar Technology AG

System description 27SI44M-80H-12-OffGrid-IA-en-11

5.3.2 Connecting the Slaves

NO C NCRelay 1

NO C NCRelay 2

A B C D E F

Figure 10: Connection of the slaves in a single-cluster system

Position Designation Description / information

A AC power cable of thestand-alone grid

Sunny Island: connection to AC1 Loads/SunnyBoys terminals L, N,and PESingle cluster system (single-phase): connect slave 1 and slave 2 tothe line conductor L1.Single cluster system (three-phase): connect slave 1 to line conductorL2, connect slave 2 to line conductor L3.For a single-phase system, the cable length and the conductor cross-section must be identical on each Sunny Island.Conductor cross-section: maximum 16 mm2

Only use the supplied ferrite for PE.

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5 Single-Cluster System SMA Solar Technology AG

System descriptionSI44M-80H-12-OffGrid-IA-en-1128

Position Designation Description / information

B AC power cable of thegenerator

Sunny Island: connection of generator to AC2 Gen/Grid terminals Land NGenerator: connect slave 1 to line conductor L2, connect slave 2 toline conductor L3.Conductor cross-section: maximum 16 mm2

For a single-phase system, the cable length and the conductor cross-section must be identical on each Sunny Island.The Sunny Island must be connected via a grounding conductor onthe terminal AC1 or AC2 to the ground potential. The conductorcross-section of the grounding conductor must be at least 10 mm2. Ifthe conductor cross-section is smaller, an additional grounding con-ductor on the enclosure with the conductor cross-section of the ACpower cable must connect the Sunny Island with the ground poten-tial.

C DC+ cable Battery connectionConductor cross-section: from 50 mm2 to 95 mm2

Cable diameters: 14 mm to 25 mmTorque: 12 Nm

D DC- cable

E Data cable for the internalcommunication in the clus-ter

Sunny Island: terminal ComSyncInWith slave 1: connection of internal communication bus of the masterWith slave 2: connection of internal communication bus of slave 1

F Data cable for the internalcommunication in the clus-ter

Sunny Island: terminal ComSyncOutWith slave 1: connection of internal communication bus of slave 2With slave 2: leave terminator plugged in. Slave 2 is connected toslave 1 only.

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6 Multicluster SystemSMA Solar Technology AG

System description 29SI44M-80H-12-OffGrid-IA-en-11

6 Multicluster SystemRequired device types for multicluster systemsIn multicluster systems for stand-alone grids, the following device types must be used:

• SI6.0H-12 (Sunny Island 6.0H)• SI8.0H-12 (Sunny Island 8.0H)• MC-BOX-6.3-11 (Multicluster-Box 6)• MC-BOX-12.3-20 (Multicluster-Box 12)• MC-BOX-36.3-11 (Multicluster-Box 36)

You can find a circuitry overview in the Multicluster-Box documentation.

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7 Commissioning SMA Solar Technology AG

System descriptionSI44M-80H-12-OffGrid-IA-en-1130

7 Commissioning7.1 Commissioning ProcedureBefore commissioning the system, you must make various settings. This section describes the procedure and gives anoverview of the steps, which must always be performed in the prescribed sequence.

Procedure See

1. Commission the inverter. Sunny Island operating manual

2. Establish a connection to the user interface of the inverter. There arethe following connection options available to choose from:

• Direct connection via WLAN• Direct connection via Ethernet• Connection via Ethernet in the local network

Sunny Island operating manual

3. Log into the user interface. Sunny Island operating manual

4. Perform the basic configuration via the installation assistant:• Single system (system with one Sunny Island)• Single-cluster-system (system with three Sunny Island)• Multicluster system (system mit several three-phase cluster)

Please note, that the personal SMA Grid Guard code for changingthe grid-relevant parameters must be available after completion ofthe first ten operating hours (see "Application for theSMA Grid Guard code" available at www.SMA-Solar.com).

Sunny Island operating manual

5. Set the functions of the multifunction relay via the user interface. Sunny Island operating manual

6. Start the system. Sunny Island operating manual

7. Test the battery current sensor. Section 7.2, page 30

8. Test the generator. Section 7.3, page 31

9. Commission the PV system. Section 7.5, page 32

10. Complete commissioning. Section 7.7, page 33

7.2 Testing the Battery Current SensorWhen using lead-acid batteries, a battery current sensor may be installed to allow precise measurement of the batterycurrent.

Requirement:☐ The Sunny Island must be in operation (for information on starting the operation see the operating manual of the

Sunny Island).

Procedure:1. Switch on a load (e.g., a 1 kW radiant heater) and all associated protective devices in the AC distribution board.2. Measure the battery current with a current clamp.3. Activate the user interface of the inverter (see the operating manual of the Sunny Island).

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7 CommissioningSMA Solar Technology AG

System description 31SI44M-80H-12-OffGrid-IA-en-11

4. Log in as Installer.5. Read off the parameter Battery > Battery > Current > Battery current.

☑ The value is positive and is within the measuring tolerance range.✖ Is the value not positive or is it outside the measuring tolerance range?

The value is negative because the measuring cables of the battery current sensor are connected with reversepolarity or the value itself is not within the measuring tolerance range since the incorrect battery currentsensor type has been set.

• Install the battery current sensor correctly (see operating manual of the Sunny Island).• Set the correct battery current sensor type (see operating manual of the Sunny Island).

7.3 Testing the GeneratorRequirement:☐ The Sunny Island must be in operation (for information on starting the operation see the operating manual of the

Sunny Island).

Procedure:1. Switch on the protective devices for the generator in the AC distribution board.2. Switch on the circuit breakers of the AC loads.3. Close the load-break switch of the generator.

☑ The generator starts.✖ Does the generator not start?

The generator management does not request the generator.orThe control cable connected does not transmit the start signal.orThe generator is not ready for operation.

• Select the parameter Generator > Manual control > Manual generator control and set to Start.This starts the generator manually (see operating manual of the Sunny Island).

• Eliminate any faults in the wiring.• Find out possible causes using the manual from the generator manufacturer and eliminate these.

4. Check via the user interface whether the parameter AC-side > Measurements of external power connection> Reactive power > Phase L1 > Output external power connection phase L1 displays the feed-in power.When a feed-in power is displayed, the Sunny Island has switched the stand-alone grid to the generator aftercompleting the warm-up time Warm-up time of generator. If no feed-in power is displayed after completion of the warm-up time, check the event messages:

• Select the Events menu via the user interface and rectify the cause of the displayed warning or error (seeoperating manual of the Sunny Island).

7.4 Testing the Load SheddingRequirements:☐ The system must not have a MC-BOX-6.3-11 or MC-BOX-36.3-11 installed. Load shedding is part of the

Multicluster-Box in a system with MC-BOX-6.3-11 or MC-BOX-36.3-1.☐ In a system with MC-BOX-12.3-20, the additional load-shedding contactor must be connected to a multifunction

relay in the master of the extension cluster.☐ The Sunny Island must be in operation (for information on starting the operation see the operating manual of the

Sunny Island).

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7 Commissioning SMA Solar Technology AG

System descriptionSI44M-80H-12-OffGrid-IA-en-1132

Procedure:1. Activate the user interface of the inverter (see the operating manual of the inverter).2. Log in as Installer.3. Select the parameter Device > Multifunction relay > Operating mode > Operating mode of multifunction

relay.4. Note the parameter value of the load-shedding contactor.5. Set the parameter of the load-shedding contactor to Off.

☑ The load-shedding contactor sheds the loads.✖ Does the load-shedding contactor not shed the loads?

The multifunction relay for triggering the load-shedding contactor was incorrectly configured.orThere is a fault in the wiring of the load-shedding contactor.

• Check the configuration and eliminate the fault.• Ensure that the multifunction relay is correctly wired.

6. Set the load-shedding contactor parameter to the setting that has been noted down.

7.5 Commissioning the PV SystemFor operation in an off-grid system, the PV system must be configured for stand-alone mode.

Procedure:1. Commission the PV system (see PV inverter documentation).2. If the SMA PV inverters are not configured for stand-alone mode ex works, configure the country standard or

country data set of the PV inverters for stand-alone mode (see the PV inverter documentation).

7.6 Testing Communication in the Multicluster System1. Activate the user interface of the inverter (see the inverter operating manual).2. Log in as Installer.3. Activate the communication test on any master within the multicluster system:

• Access the Sunny Island user interface for the selected master (see operating manual of the Sunny Island).• Log in as Installer.• Set the parameter Activation of communication test between the clusters to On.

4. Check the status of the communication test on each master within the multicluster system. For this, execute thefollowing steps:

• Access the Sunny Island user interface for the selected master (see operating manual of the Sunny Island).• Log in as Installer.• Select the parameter Status of the communication test and read off the value.☑ The parameter Status of the communication test has the value OK. The communication test is completed

on the respective master.✖ Does the parameter Status of the communication test has the value Wait?

It is possible that the cabling of the communication bus is faulty.• Ensure that the cable length for the multicluster communication is not exceeded.• Ensure that all cables of the multicluster communication are correctly connected (see operating manual

of the Sunny Island).

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7 CommissioningSMA Solar Technology AG

System description 33SI44M-80H-12-OffGrid-IA-en-11

• Ensure that the terminators for the multicluster communication are correctly inserted (see operatingmanual of the Sunny Island).

5. When the communication test on each master within the multicluster system is completed, deactivate thecommunication test:

• Access the Sunny Island user interface for the selected master (see operating manual of the Sunny Island).• Log in as Installer.• Set the parameter Activation of communication test between clusters to Off.

7.7 Complete Commissioning.1. Adjust the configuration of the inverter to the system via the user interface (see operating manual of the

Sunny Island). This way, you can increase the service life of the battery, for example.2. When full charge of the battery is complete, switch on all circuit breakers and load-break switches.3. In order to receive service assignments for the Sunny Island system, all system data must be recorded in the

information sheet for Sunny Island systems and made available to Service (for information sheet see www.SMA-Solar.com).

Load shedding in the first two operating hoursThe state of charge (SOC) recorded by battery management and the available battery capacity (SOH) of thebattery will deviate strongly in a newly connected battery from the actual SOC and SOH values. In the first twooperating hours using the new battery, these deviations can lead to load shedding.During operation, the values recorded by battery management will gradually approach the real values.

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8 Contact SMA Solar Technology AG

System descriptionSI44M-80H-12-OffGrid-IA-en-1134

8 ContactIf you have technical problems with our products, please contact the SMA Service Line. The following data is requiredin order to provide you with the necessary assistance:

• Type of system installed (e.g. three-phase single-cluster system)• Battery inverter:

– Device type– Quantity– Serial numbers– Firmware version– Event message

• Type of the communication products connected• Type and size of additional energy sources• Type, power and maximum current for the generator (if present)• Batteries:

– Type– Nominal capacity and nominal voltage (with lead-acid batteries)

DeutschlandÖsterreichSchweiz

SMA Solar Technology AGNiestetalSunny Boy, Sunny Mini Central,Sunny Tripower: +49 561 9522‑1499Monitoring Systems(Kommunikationsprodukte):+49 561 9522‑2499Fuel Save Controller(PV-Diesel-Hybridsysteme):+49 561 9522-3199Sunny Island, Sunny Boy Storage,Sunny Backup:+49 561 9522-399Sunny Central, Sunny Central Storage: +49 561 9522-299SMA Online Service Center:www.SMA-Service.com

BelgienBelgiqueBelgiëLuxemburgLuxembourgNederland

SMA Benelux BVBA/SPRLMechelen+32 15 286 730SMA Online Service Center:www.SMA-Service.com

ČeskoMagyarországSlovensko

SMA Service Partner TERMS a.s.+420 387 6 85 111SMA Online Service Center:www.SMA-Service.com

Türkiye SMA Service Partner DEKOM Ltd. Şti.+90 24 22430605SMA Online Service Center:www.SMA-Service.com

France SMA France S.A.S.Lyon+33 472 22 97 00SMA Online Service Center :www.SMA-Service.com

ΕλλάδαΚύπρος

SMA Service Partner AKTOR FM.Αθήνα+30 210 8184550SMA Online Service Center:www.SMA-Service.com

EspañaPortugal

SMA Ibérica Tecnología Solar, S.L.U.Barcelona+34 935 63 50 99SMA Online Service Center:www.SMA-Service.com

United Kingdom SMA Solar UK Ltd.Milton Keynes+44 1908 304899SMA Online Service Center:www.SMA-Service.com

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8 ContactSMA Solar Technology AG

System description 35SI44M-80H-12-OffGrid-IA-en-11

Italia SMA Italia S.r.l.Milano+39 02 8934-7299SMA Online Service Center:www.SMA-Service.com

Australia SMA Australia Pty Ltd.SydneyToll free for Australia:1800 SMA AUS(1800 762 287)International: +61 2 9491 4200

United ArabEmirates

SMA Middle East LLCAbu Dhabi+971 2234 6177SMA Online Service Center:www.SMA-Service.com

India SMA Solar India Pvt. Ltd.Mumbai+91 22 61713888

ไทย SMA Solar (Thailand) Co., Ltd.กรุงเทพฯ+66 2 670 6999

대한민국 SMA Technology Korea Co., Ltd.서울+82-2-520-2666

South Africa SMA Solar Technology South AfricaPty Ltd.Cape Town08600SUNNY (08600 78669)International: +27 (0)21 826 0600SMA Online Service Center:www.SMA-Service.com

ArgentinaBrasilChilePerú

SMA South America SPASantiago de Chile+562 2820 2101

Other coun-tries

International SMA Service LineNiestetal00800 SMA SERVICE(+800 762 7378423)SMA Online Service Center:www.SMA-Service.com

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www.SMA-Solar.com